Aspect Ratio Calculator
Simplify a width:height ratio, or solve for a missing dimension when you know the target ratio and one side.
Common Ratios (click to load)
Enter Values
Result
Enter width and height to simplify the ratio
About Aspect Ratios
An aspect ratio is the proportional relationship between the width and height of an image, video, or screen, written as width:height. It is found by dividing both dimensions by their greatest common divisor (GCD).
Simplify a ratio
1920×1080 → 16:9
Solve a missing side
16:9 at width 1920 → height 1080
Frequently Asked Questions
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